# Quantum simulations with multiphoton Fock states

## TL;DR

This paper demonstrates the first quantum simulation using higher-order Fock states with multiple indistinguishable photons, enabling exploration of complex quantum phenomena beyond previous resources like qubits and coherent states.

## Contribution

It introduces a novel approach to quantum simulation employing genuine multiphoton Fock states, expanding the capabilities of quantum modeling of topological matter and non-linear systems.

## Key findings

- Revealed new topological phases
- Simulated non-linear quantum systems
- Demonstrated quantum transfer of Majorana fermions

## Abstract

Quantum simulations are becoming an essential tool for studying complex phenomena, e.g. quantum topology, quantum information transfer, and relativistic wave equations, beyond the limitations of analytical computations and experimental observations. To date, the primary resources used in proof-of-principle experiments are collections of qubits, coherent states or multiple single-particle Fock states. Here we show the first quantum simulation performed using genuine higher-order Fock states, with two or more indistinguishable particles occupying the same bosonic mode. This was implemented by interfering pairs of Fock states with up to five photons on an interferometer, and measuring the output states with photon-number-resolving detectors. Already this resource-efficient demonstration reveals new topological matter, simulates non-linear systems and elucidates a perfect quantum transfer mechanism which can be used to transport Majorana fermions.